LO,SH and PN are multivalue VR.
fixed bug: encoding with character set different of UTF8 does not work
added constructor with encoding parameter to Elements with support of different encodings: LO, LT, PN, SH, ST, UT
Merge remote-tracking branch 'origin/master'
Merge pull request #34 from mdubey82/master

LO,SH and PN are multivalue VR.
Merge pull request #36 from lste/master

Some fixes in handling of encodings
Merge branch 'master' into portable